Speed-varying mechanism.



D. G. WOODWORTH. SPEED VARYING MECHANISM. APPLICATION FILED OUT. 20. 1913.

Patented Dec. 29. 1914.-

I ii WI 5 fizz/144774)? THE NORRIS PETERS CCL. PHOTO-LITHO, WASHINGTON D. G

DALLAS o. woonwoarrr, or nocK ISLAND, ILLINOIS. 1

To all whom, it concern:

Be it known that I, DALLAS C. Woon- WORTH, a citizen of the United States, and

The invention consists in the combinations and arrangements of parts hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings forming a part of this specification, and in which Figure 1 is a side elevation of a device embodying my invention, Fig. 2 is a plan view of the same, and Fig. 3 is an end elevation of the same.

The preferred form of construction as illustrated inthe drawings comprises a base member 4: having an upwardly extending arm 5 carrying bearings 6 at its top in which is rotatably mounted a shaft 7. The shaft 7 is provided with a shoulder 8 and a spring 9 around the smaller portion of said shaft and pressing against shoulder 8 and one of bearings 6. On one end of shaft 7 is a friction disk 10 rigidly secured thereto and on the other end thereof is a driving pulley 11 also rigidly secured thereto. There is a small space between the hubs of friction disk 10 and pulley 11 and their respective bearing 6 to permit of slight longitudinal movement of shaft 7 On the base 1 are also arms 12 carrying bearings 18 at their upper ends. Rotatably mounted in the bearings 13 is a shaft 14 carrying a friction wheel 15. The shaft 14 and shaft 7 are dis posed substantially in the same plane and.

SPEED VARYING MECHANISM.

rs WENT; Q FIQE' Pl Specification of Letters Patent. Patentd Dec, I, Application filed. October 20, 1913'. :Seria1No.7e6,218.- I 3 supporting members 18 is a rod "andia x pulley 20 loosely mounted thereon. 'A U- shaped member'y21 is provided with collars;

22 atthe ends thereof and said collars are disposed attheends of the hub of'pull'ey'20j and are adapted to control the movement of saidpulley longitudinally of rod 19. A rod 23 is secured toU-shapedfmember 21"and afiords a means for movingtheYU-shaped member longitudinally" of rod '19 B'y- 'this arrangement it will be observed that pulley 20 may be adjusted betweenfrictiondisk 10 and friction, cylinder 15 so as to vary the speed of transmission from one to the other.

When the pulley 20 is adjustedto'contact;

with the center of disk 10 no motion will be transmitted, but when said pulley is adjusted to either side of the center of disk 10, motion will be transmitted from one member to 'the other, but in opposite'directions, as will be readily understood. Spring 9 nor mally presses the disk 10 against pulley 20 i and the latter against friction. wheel 15.

The sliding connection between members 18 friction between said members as will be ted motion. The specific arrangement of parts constitutes a simple and efficient one for the purpose.

While I have illustrated and described the preferred form of construction for car rying my inventioncinto effect, this is capable of variation and modification without departing from the spirit ofthe. invention. "I, therefore, do not wish to be limited to the precise detailsj'of:construction "set forth, but desire to avail myself of such variations and modifications as come within a I v Having described my invention what I,

the scope of the appended claims.

claim as new and desire to secure. by Letters Patent is:

1. A speed'varying mechanism comprising a base having.upstanding'bearing members thereon; a shaft journaled incertain of said bearing members and adapted for slight longitudinal movement a friction disk carried by said shaft;- a second shaft mounted in certain of the other-of said bear-1 ing members; a friction cylinder fixed on said last mentioned shaft; two rods mounted v ley and friction cylinder in operative engagement, substantially as described.

, 2. A speed varying mechanism comprising a base having upstanding bearing mem bers thereon; a shaft ournaled in certain of said bearingmembers and adapted for slight longitudinal. movement; a friction disk carried by said shaft; a second shaft mounted in certain ofthe other of said bearing members; a friction cylinder fixed on said last mentioned shaft; two rods mounted at right 5mm may be obtained fer angles to said last mentioned shaft; a member slidably mounted on each of said rods; a third rod'carried by said members; a pulley rotatably and slidably mounted on said last mentioned rod between said friction disk and friction cylinder; and a spring on said first mentioned shaft presslng against a por tion thereof and one of its supporting bearings and resiliently holding said friction disk, pulley and friction cylinderin operative relations substantially as described.

In testimony whereof I have signed my :1

name to this specification in the presence of two subscribing Witnesses.

, DALLAS C. WOODWORTH. Witnesses:

LAURENCE KRAMER; CHAS. W. GINNANE.

fire cents each, by addressing the Commissioner of Eatentu. Washington, D. C." 

